Patents by Inventor Philip M. Papoojian

Philip M. Papoojian has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Pellicle compositions and pellicles thereof for projection printing
    Patent number: 4499231
    Abstract: A pellicle for use in projection printing comprises a pellicle in which the transparent film is formed from a polyvinyl butyral resin or from a casting composition which is a mixture of a polyvinyl butyral resin and a dispersion of colloidal silica and a silicone resin which is a lower aliphatic alcohol-water solution of the partial condensate of a silanol. A pellicle employing such films are useful in the near, mid and deep UV regions.
    Type: Grant
    Filed: March 22, 1983
    Date of Patent: February 12, 1985
    Assignee: J. T. Baker Chemical Company
    Inventors: Irl E. Ward, Philip M. Papoojian